如图将一条两边都互相平行的纸带进行折叠,设∠1为45°,则∠2=_____ °.
![](https://img.xkw.com/dksih/QBM/2019/5/30/2214768621928448/2215462131253248/STEM/23237334ba4d47d591e1426439dc1a80.png?resizew=135)
更新时间:2019-05-31 12:32:09
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【推荐1】如图,一块含有60°三角板的顶点O在直线AB上,
∥
.则
=______ 度.
![](https://img.xkw.com/dksih/QBM/2015/7/24/1573885032407040/1573885038665728/STEM/8e694a52641047d0ac831c447e06af97.png?resizew=27)
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![](https://img.xkw.com/dksih/QBM/2015/7/24/1573885032407040/1573885038665728/STEM/c19554974e5743f89d5fc23d0d53ca5d.png?resizew=154)
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【推荐2】如图,将一块直角三角板的直角顶点放在直尺的一边上,如果
,那么
的度数是___________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f586d178cb0f69dd900967766ba8950a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
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【推荐1】如图,把
沿平行于
的直线
折叠,使点A落在边
上的点F处,若
,则
的度数为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,在边长为2的菱形
中,
,
为
边上的高,将
沿
所在直线翻折得
,
与
边交于点F,则
的长度为_________ .
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